Westermo MR Series - Manual (Page 147)

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Web Interface and Command Line Reference Guide www.westermo.com
NAT traversal enabled:
When set to “On”, this parameter enables support for NAT traversal within IKEv2/IPSec. When
one end of an IPSec tunnel is behind a NAT box, some form of NAT traversal may be required
before the IPSec tunnel can pass packets. Turning NAT traversal on enables the IKE protocol to
discover whether or not one or both ends of a tunnel is behind a NAT box, and implements a
standard NAT traversal protocol if NAT is being performed. The version of NAT traversal sup-
ported is described in the IETF draft “draft-ietf-ipsec-nat-t-ike-03.txt”.
NAT traversal keep-alive interval (s):
This parameter may be used to set a timer (in seconds), such that the unit will send regular
packets to a NAT device in order to prevent the NAT table from expiring.
RSA private key file:
This parameter specifies the name of a file for the X.509 certificate holding the unit’s private
part of the public/private key pair used in certificate exchanges. See “X.509 Certificates” in the
“IPSec and VPNs” section for further explanation.
Using Text Commands
From the command line, use the ike2 command to configure or display IKE2 initiator settings. To
display current settings for an IKE2 instance enter the command:
ike2 ?
where is 0 or 1.
To change the value of a parameter use the command in the format:
ike2
The parameters and values are:
Parameter Values Equivalent Web Parameter
iauthalg md5, sha1 Authentication algorithm
idhgroup 1,2,5,! MODP group
iencalg des, 3des, aes Encryption algorithm
ienkeybits 128, 192, 256 Encryption key length (AES only)
inactto 0-255 Inactivity timeout
Iprfalg md5, sha1 PRF algorithm
ltime 1-28800 Duration
natkaint number NAT traversal keep-alive interval
natt off, on NAT traversal enabled
openswan off, on None. Enable Openswan support.
privrsakey filename RSA private key file
rekeyltime number Re-key time (s)
retran 0-9 Maximum re-transmits
retranint 0-255 Re-transmit interval
Note:
Using ! for a parameter in a text command means blank.
For example, to turn NAT traversal on you would enter:
ike2 0 natt on